说明：  仿真一维均匀平面电磁波在自由空间（理想介质）中的传播； 假设传播方向沿 +x 轴，即均匀平面电磁波的波阵面与yOz平面平行。
(Simulation of one-dimensional uniform plane wave propagation in free space (over medium) in assume that the propagation direction of the axis+x that uniform wavefront yOz plane parallel to the plane of the electromagnetic wave.)